Dishwashing machine



Apr. R7, 1923. nA-SM5@ A. L. HATFIELD DISHWASHING MACHINE INVENTOR /6 ndz'e/Lja eid j BY j y ATTO R N EYS Apr. 17, 1923. 1,452,156

A. L. HATFIELD DISHWASHING MACHINE Filed Nov. 7 1919 2 Sheets-Sheet 2 INVENTOR v mZmm/L-Hw wid;

hdtihliti rarer-ur caricial ANDREW 1L. HATFELD, 0F HJILLSDE, NEW JERSEY.

, DISHWASHING MACHNE.

application alec november a, raie. semi no. seance.

' and to characters of reference marked thereon, which form a part of this specification.

rlFhe present invention has reference, generally, to improvements in dish washing machines; and the invention relates, more particularly, to a simple, compact and efficient construction ot dish washing machine provided with a noveli means for showering the dishes placed therein with the cleansing water, thus distinguishing the same in its principle of operation from that type ot dishwashing machine in which'the dishes are immersed in water, and then agitating either the dishes or the water.

rlhe present invention has for its principal object to provide a novel construction of receptacle or tank in which a basket containing the soiled dishes is placed and positioned to receive a shower of cleansing water, which is caused to flow over the dishes in such a manner that the impact thereof quickly removes and carries away from the same the dirt and grease lodged upon their surfaces. ltwill thus be apparent that there is required no agitation ot the dishes with the accompanying risk of breakage, and, furthermore, the dishes are not submerged in soiled or greasy water.

"ik further obiect of the invention is to jprovide in the novel dish washing machine of the general'character above mentioned, a novel construction of means for producing the showering movement of the cleansing water, in such a manner, that the s raying or dashing' of the water is alternate y initiated i'rom opposite sides of the tank, so that the resulting shower, impacting upon the dishes in im ulses `from opposite directions alternate y assures the uick and thorough dislodgment and remova from the surfaces of the dishes all matter tending to adhere'thereto.

Another 'object of the present invention [is to provide a means for circulating the Other objects of the present invention,

'not at this time more particularly enumerated, will be clearly understood from the following detailed description of the same.

With the various objects of the invention in view, the same consists, primarily, in the novel construction of dish washing machine hereinafter set forth; and the invention consists, furthermore, in the novel arrangen ments and combinations of the various devices and parts, as well as in the details of the construction of the same, all of which will be hereinafter more vhilly described, and then `finally embodied in the claims appended hereto.

The invention is clearly iillustrated in the accompanying drawings, in which Figure l is a front elevation of the novel dish washing machine, made according to and embodying the principles ot my present invention; Figure 2 is a transversey vertical section through the same; Figure 3 is a detail cross-section, taken on line 3-3 in said Figure l, the same being drawn on an enlarged scale; Figure l is a detail horizontal section, taken on line d-i in said Figure l, the same being also drawn on an enlarged scale; Figure 5 is a perspective view of one form of dasher element, and Figure@ is a perspective view of another orm'ot dasher element, both of which are employed in the water shower producing mechanism of the novel dish washing machine. Similar characters of reference are em ployed in all of the hereinabove described rviews, to indicate corresponding parts.

Referring now to the said drawings, the

reference-character l indicates the main tank or the novel washing machine, which is preferably rectangular in form, and which is preferably made of a suitable sheet metal. The Ibottom of said tank 1 is ot peculiar formation', in that it is upwardly bowed to provide a downwardly inclined or sloping member 2 extending from its longitudinal center or median line to the left side of the tank, thus providing in the bottom a left hand trough 3 at one side of the tank, and a downwardly inclined or sloping member e extending from its longi lll@ lll@

' the bottom titl tudinal center or median line to the right side of the tank, thus providing in the bottom a right hand trough at the opposite side of the tank. The juncture or apex 6 of said sloping members 2 and 4, which extends centrally from front tojrear of the a return of Water equall to both troughs 3 and 5, during the operation of the machine.

The said tank 1 is su ported by a suitable frame work 7 to whic it is secured, said frame-work having standards or legs 8. Supported in connection with said standards orlegs 8, so as to be positioned beneath the tank and spaced downwardly a suitable vdistance therefrom, is a platform or shelf 9.

Supported upon said platform or shelf 9 is a casing or housing 10 in which is arranged a water heating coil 11, the upper end 'of which is connected by a suitable pipe connection 12, in communication with the bottom interior of said tank 1. rlhe lower end of said water heating coil 11 is connected in communication with a water supply pipe 13, which has a shut-od valvel 14 for controlling the flow oi' water to said tank throu h'said water heating coil. Supported wit in said casin or housing 10, beneath said Water heating coil 11, is a gas-burner 15, to which is connected a gas supply pipe 16, which has a shut-off valve 17 for controlling the flow of gas to said gas burner. f.

The reference-character 18 vindicates a drain pipe, which is connected by suitable pipe fittings 19 so as to communicate with interiors of the respective troughs 3 and 5, said drain pipe 18 having a suitable shut-od valve 20 therein.

Mounted in said tank 1 so as to extend through the same above said trough 3 is a shaft 21, the journals 22 of which project exteriorly of said tank trough stuing-box bearings 23 with which said frame work 7 is rovided. In like manner, mounted in sai tank so as yte extend through the same above the trough 5 is another shaft 24, the journals 25 of which y'also project exteriorly of said tank through similar stuffing box bearings suitabl located in connection with said frame wor 7. Secured upon the forwardly projecting journal 22 of said shaft 21 is a sprocket wheel 26, and. in like manner, secured upon the forwardly projecting journal 25 of said shaft 24 is a' sprocket wheel 27. Saidframe work 7 is provided on its front portion with an intermediate bracket member 28 from which extend af pair of outwary projecting stud journals 29 and 29. journal 29 is a gear 30, upon the hub 31 of which is fixed a sprocket wheel 32 over which runs a drive chain 33 operated by said sprocket Wheel 26 of the shaft 21. Mounted Mounted to rotate on said stud to rotate on said stud journal 29 is a gear 34 which meshes with and is driven by said gear 30. Uponfthe hub 35 of said gear 34 is fixed a sprocket wheel 36 which drives a chain 37 running over the sprocket wheel 27 of said shaft 24 to drive the latter. By tank provides -a water shed, which assures.-

means of the above described interconnecting transmission mechanism it will be -seen that a rotary motion imparted to said shaft 21 in one direction will also be transmitted to said shaft 24 to produce a rotation ot the latter in an opposite direction.

Secured u on said shaft 21 are a series ot dasher mem ers 38, each possessing a hub portion39 for attaching the same upon the shaft. Each dasher member comprises a radially disposed arm having in its forward face a cup-like depression or bucket 40. rl`hese dasher-members are arranged rela-tive to the longitudinal extent of the shaft so that, in their assembled relation, they will be mutually off-set to produce a helical line of the same extending along the shaft. rlhis arrangement of the dasher members may be accomplished in many ways, but l have found, that by constructing the main body of the shaft 21 to provide the same with a square 'cross-section, and then providing tti two types of dasher members, one having its arm extending from the angle A of a correspondingly square cross-sectionally shaped hub (see igure 5), and the other having its arm extending from al face plane B of a square cross-sectionally shaped hub (see Figure 6), and then sliding these types of dasher members alternately over the square portion of the shaft, so that each successive armof the same will be oH-set or advanced equivalent to an eighth of a turn of said shaft beyond its predecessor, not only will the desired helical disposition of the dasherlll@ members be obtained, but, owing to the mounting of the same upon the square shaft, it is impossible for any single dasher member to work loose, or become accidentally displaced from its normal position relative Secured tov to its fellows on either side. said shaft 24, in like manner, are a series of said dasher members 38. llt is desirable that the dasher members of said shaft 24 shall be so set on the latter relative to the positions of the opposing dasher-members of the shaft 21 in such a manner that the throwing period in the cycles of the former will occur after ,the throwing period in the cycles of the latter, so that in operation water thrown by the latter will wash over the dishes in one direction, to be followed by water thrown by the former so as to wash over the dishes in the opposite direction, and consequently the water will be dashed alternately from the respective troughs 3 and 5. The dasher members ot the res ective shafts 21 and 24, as they are rotate by the latter, will be caused to respectively dip into the respective izo posited in an open mesh basket 41 which ossesses leg) members 42, whereby the asket may e supported upon the bottoni of the tank above the water and intermedi ate the shafts 21 and24- and their dashermembers. When the basket of dishes is thus positioned wit-hin the tank, and the shafts.

21 and 24, are rotated the same will receive the cleansing impact of successive dashes of water which will travel from front to rear of the basket by reason of the helical disposition of the dasher members on the shafts, a dash from one side at one point being alternated with or followed by a dash from the opposite side, the cycle of dashes thus produced being, continued until the dishes are clean.

Secured upon the platform or 'shelf 9 is an electric motor 43 upon the shaft 44 of which is fixed a driving sprocket 45 which operates a drivev chain 46 which runs over a sprocket 47 fixed on said :torward journal 22 of said shaft 21, thereby serving `as a power source for rotating the shaft 21 and its 'dasher members, and through the intermediate transmission mechanism the shaft 24 and its dasher members. 0f course, it will be understood that the machine Vmay be operated by hand, in which case, the journal 22 may be provided with a crankhandle 48, as indicated by dotted lines in Figure 3 of ,the drawings.

lln order to prevent the water from being splashed out of the tank 1, during the operation of the machine, l provide the tankv at its upper marginal edge with an inwardly projecting flange 49 having an inwardly and downwardly inclined free edge or lip 50. rlhis flange with its lip serves to catch and return tothe bottom of the tank any water which illes upwardly and outwardly 'across the interior of the tank, and beyond the basket of dishes. lA removable cover member 51 provided with the inwardly set downwardly projecting flange 152, which telescopes into said tank mouth as defined by the lip 50 of the flange 49, closes the open .mouth of the tank, said cover-member having a horizontal tends over the flange 49 thus closing the triangular space 54 remaining between the lip 50 and the flange 52 of the cover so that even 1t water does escape between said lip 50 and flange 52, it cannot escape beyond the dange 53, but will rebound therefrom in said triangular space 54 from whence it will drain back into the tank.

It will be understood, that as the water is dashed from side to side of the tank by the dasher-members 38, and is thus thrown over and upon the dishes in the basket 41, it

peripheral llange 53 which ex.

will drain back upon the water shed at the bottom of the tank 1 and willl return to the respective troughs 3 and 5. 'llhe machine may be operated with a depth of water sufficient to cover and fill the troughs. rlhe preferable manner of using the machine, is to pass water through the heating coil 11, wherein it is heated before entering the tank, and then opening the drain pipe 18, so that the soiled water may gradually drain away to be replaced by a controlled llow of additional hot water entering through the heating coil 11, and thus continuing the operation of the machine until the drained water flows clear, whereupon both the washing and rinsing operations will be completed and the dishes thoroughly cleansed. H desired, however, a suhcient quantity of hot water may be introduced into the tank (the drain pipe being closed), and the machine then operated until the dishes are clean, whereupon the drain pipe may be opened to drain oil the soiled water, and then freshhot water maybe introduced and the machine again operated to edect a rinsing operation.

From the above description it will be clear that my dishfwashing machine is of a very simple construction, involving little- Inechanism likely to get out of order, and requiring little power to operate, since the functioning thereof does not require the agitation of a heavy mass ot water, or a similarly heavy load of weighty dishes, but merely necessitates. the dashing of a small quantity of water in a successive manner, to thus create a continuous cleansing showerl upon the dishes adapted to edect a thorough removal of all soil. A further advantage in the functioning oit my machine being that, since the dishes remain stationary during thei washing operationA there is little likelihood o their becoming broken, chipped or otherwise injured.

ll am aware that some changes may be made in the several arrangements and combinations of the various devices and parts, as well as in the details of the construction of the same, without departing from the scope of my present invention as set forth in the foregoing speciiication and as defined in the appended claims. Hence, i do not limitmy invention to the exact arrangements and combinations of vthe various parts as described in said specification, nor do ll conine myself to the exact details of the con- Dil struction of the said parts as illustrated in the accompanying drawings.

l claim Y 1. ln a dishwashing machine, the combina# tion with a tank having trough-like depressions extending along two sides ot its bottom interior, a shaft extending through said tank above each trough like depression; radial dasher members mounted on each shaft and relatively setto form a helical line of bers of one shaft being set thereon to operate in successive alternate relation tothe opposing corresponding dasher members of the other shaft, means for supporting dishes Within said tank intermediate said shafts and their dasher members, and means for rotating said shafts in opposite directions to dash Waterfrom said trough-like depressions upwardly and over said dish-supporting means and its contents.

2. n a dish-Washing machine, the combination With a tank having trough-like depressions extending along tW'o sides of its bottom interior, a Water dashing means comprising a pair of parallel shafts respectively extending above said respective trough-like depressions, each shaft being of square cross section, a plurality of dasher members for each shaft having corresponding square hub portions to lit the Shaft, certain of said dasher members projecting from an angle of their hub portions, other of said dasher members projecting from a plane face of their hub-portions, said respective types of dasher members being alternately disposed on the shaft'to project the same at progressively off-set radial angles to form a helical line about the shaft, and the dasher members of one shaft being set thereon to operate in successive alternate relation to theJ opposing corresponding dasher members on the opposite shaft.

In testimony that I claim the invention set forth above have hereunto set my hand this lst day of November, 1919.

ANDREW L. HATFIELD.

Witnesses:

(rEoRGE D. RICHARDS, BARBARA SU'ITERLIN. 

